Process of manufacturing acorn nuts



May 22, 1923. 1,456,215 H. M. BRIGHTMAN PROGESS OF MANUFACTURING Acogu NUTS Filed Oct., 28. 1921 WOR- HARRISON M.BRIBH1'MA1 I Patented May 22, 1923.

UNITE t as Y HARRISON M. snrenrmanor contra/revs, OHIO, AssrGnon-or onE-roun'rrr'ro e. r. 'BRIGHTMAN, onn-rounrn TO H. L. BRIG-HTMAN, Ann onn-roun'rrr1ro ,-J. n.

BRIGHTMAN, ALL OF COLUMBUS, OHIO.

rn-oonss or mnnurncrunnve Aconu vurs.

Application filed October 28, 1931. Serial nations To all whom it may concern:

Be it known that I, HARRISON M. BRIGHT- MAN, a citizen of the United States of America, residing at Columbus, in the county of Franklin and Stateof Ohlo, have invented certain new and useful Improve.-

inents in Processes of Manufacturing Acorn closed at one end and which are used where it is desired to conceal and to some extent ornament the tree end of the bolt on which the nut screws.

It is a well known fact that according to the present processes in which the blank is formed complete with a closed end and subsequently threaded. it is not possible to continue the threads for the full depth of the bore and it is also a well known fact that these processes are somewhat costly and result in quite an appreciable proportion ofdet'ective nuts.

My invention aims to provide a process which will greatly reduce the cost of the operation as well as the proportion of detective nuts resulting therefrom, and also one which will permit of a finished product continuously threaded for the full length or depth of its bore.

In the accompanying drawing illustrative of the several steps of the process, and which forms a part or this specification,

Figure 1 is a side view or the blank as it is formed complete in the first instance,

Figure 2 is a longitudinal section therethrough after it has been internally threaded,

Figure 3 is a longitudinal section through the finished nut.

Figure l is a sectional view'illustrating the practical application of the finished nut to a bolt, 1 t

Figure 5 is a side view showing a slight modification as to contour,

Figure 6 is a view showing an internally threaded blank on an arbor ready for the spinning operation, and

Figure 7 is a view showing the application of a forming tool to the nut during the spinning operation. a

Referring now to these figures inyinventron proposes a processor manufacturing acorn nuts which consists in first forming a tubular nut blank 10 as 111 Flgure 1, whlch be accomplished in the various auto-,

inatic nut forming machines now in use, the blank having the usual hexagonal shape and. in addition'thereto having one taperingreduced end 11 and a thin walled extension 12 projecting beyond the tapering en d'll. This blank is internally threaded 'throughout its length as shown in Figure 2, that is not only through its main or body portion with its external hexagonal faces but through its tapering end 11 and throiwh its thin walled extension 12 the nature of the latter of which may be clearl seen in this figure.

In the further steps of the process the blank thus, formed and internally threaded. is screwed onto the threaded extension of a rotating arbor 14 as shown in Figure 6 and a heating tool more or less diagrammatically seen at'15 is advanced against the extension 1:2 and the latter heated by virtue of frictional contact between this tool and the rotating nut to such a point that a forming implement-also more or less digrannnatically shown at 161nay be subsequently advanced as indicated in Figure 7 whereby the heated extension 12 will be swung inwardly and welded over and against the end of the arbor so as to completely close the outer end of the nut. i

It will be noted that in the preparation for these last steps, the spinning, welding and closing of the outer end of the nut, the extension 12 as indicated in Figures 1 and 2 bears such relation to the tapering end 11 from which it projects that the closed or capped end 17 of the finished nut'emerges at its exterior with the tapering endjll as plainly seen in Figure 4, irrespective of whether the closed end is rounded onthe arc of a circle as indicated in Figures 3 and 4:

or has for ornamental purposes an axial pro tuberance 18 as shown in Figures 5 and 7.

It is obvious in any event that by virtue of the particular process I propose, the objections to the processes now ordinarily employed are overcome and in the finished nut the internal threads 13 are left therein to the full length or depth of its bore whereby the nut may be threaded'onto a bolt 19 as in Figure at until the end of the-bolt abuts the closed end 17.

I claim:

'1. The herein described facturing acorn nuts which consists in first forming a tubular nut blank with one end. reduced on a taper and'with a thin Walled extension beyond said, reduced end, internally threading the blank throughout its length, and then spinning the extensioninwardlyto close one end of the nut 2. The herein described process of manufacturing acorn nuts which consists in first forming a tubular nut blank'with one end reduced on a taper and with a thin walled extension beyond said reduced end, internally threading the blank throughout its length, and then so spinning the extension inwardly as to form a closing cap'at one end of the nut whose external curved surface merges with the surface of the reduced tapering end of the nut as described.

3. The herein described process of manuproce'ss of menu facturing acorn nuts which consists in first forming a tubular nut blank with one end reduced on a taper and with a thin walled extension beyond said reduced end, internally threading the blank throughout its length, and then spinning the said extension inwardly and welding the same at its axis to form a completely and permanently closed cap.

"i. The process of manufacturing acorn nuts which consists in forming a tubular blank with one tapering end and a thin walled extension projecting from said tapering end; internally threading the blank throughout its length, and then collapsing the extension to close the respective end of the nut.

5. The process of manufacturing acorn nuts, which consists in forming a tubular blank with a thin walled extension at one end, internally threading the blank including said extension and then spinning the extension inwardly to close the respective end of the nut.

signature.

HARRISON M. BRIGHTMAN. 

